/*
  Copyright (C) 2005, 2004 Erik Eliasson, Johan Bilien
  
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

/*
 * Authors: Erik Eliasson <eliasson@it.kth.se>
 *          Johan Bilien <jobi@via.ecp.fr>
*/


#include<config.h>

#include <openssl/hmac.h>
#include <libmcrypto/hmac.h>

void hmac_sha1( const unsigned char * key, unsigned int key_length,
		const unsigned char * data, unsigned int data_length,
		unsigned char * mac, unsigned int * mac_length ){
	HMAC( EVP_sha1(), key, key_length, data, data_length, mac, mac_length );
}

void hmac_sha1( const unsigned char * key, unsigned int key_length,
		unsigned char * data_chunks[],
		unsigned int data_chunck_length[],
		unsigned char * mac, unsigned int * mac_length ){
	HMAC_CTX ctx;
	HMAC_CTX_init( &ctx );
	HMAC_Init_ex( &ctx, key, key_length, EVP_sha1(), NULL );
	while( *data_chunks ){
		HMAC_Update( &ctx, *data_chunks, *data_chunck_length );
		data_chunks ++;
		data_chunck_length ++;
	}
	HMAC_Final( &ctx, mac, mac_length );
	HMAC_CTX_cleanup( &ctx );
}

